Internet
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Internet address space is distributed according to the following
three goals:
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... Conservation: Fair distribution of globally unique Internet address
space according to the operational needs of the end-users and Internet
Service Providers operating networks ...
... Conservation: Fair distribution of globally unique Internet address
space according to the operational needs of the end-users and Internet
Service Providers operating networks using this address space.
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... Prevention of stockpiling in order to maximize the lifetime of the
Internet address space.
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... Routability: Distribution of globally unique Internet addresses
in a hierarchical manner, permitting the routing scalability ...
... addresses. This scalability is necessary to ensure proper
operation of Internet routing, although it must be stressed that
routability is in no way guaranteed with the allocation or
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... registry documenting address
space allocation and assignment. This is necessary to ensure
uniqueness and to provide information for Internet trouble shooting
at all levels.
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It is in the interest of the Internet community as a whole that the
above goals be pursued. However it should be noted that
"Conservation" and "Routability" are often conflicting goals. All
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... "Conservation" and "Routability" are often conflicting goals. All
the above goals may sometimes be in conflict with the interests of
individual end-users or Internet service providers. Careful analysis
and judgement is necessary in each individual case to find an
appropriate compromise.
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... The Internet Registry system ...
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In order to achieve the above goals the Internet Registry (IR)
hierarchy was established.
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The Internet Registry hierarchy consists of the following levels
of hierarchy as seen from the top down: IANA, Regional IRs, Local
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... authority over all
number spaces used in the Internet. This includes Internet
Address Space. IANA allocates parts of the Internet address ...
... number spaces used in the Internet. This includes Internet
Address Space. IANA allocates parts of the Internet address space
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... Internet. This includes Internet
Address Space. IANA allocates parts of the Internet address space
to regional IRs according to its established needs.
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... authority of the IANA.
This requires consensus within the Internet community of the
region. A consensus of Internet Service Providers in that region
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... This requires consensus within the Internet community of the
region. A consensus of Internet Service Providers in that region
may be necessary to fulfill that role.
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... Guidelines for Internet Service Providers (ISPs) ...
... requirement, when satisfied with a contiguous block allocation, has a
reasonable probability of being routable on the Internet, and they
meet one or more of the following conditions.
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... ISP is multi-homed, that is, it has more than one
simultaneous connection to the global Internet and no
connection is favored over the other
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... addresses issued directly from the IRs (non-provider
based), are the least likely to be routable across the Internet.
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... address assignments as loans for the
duration of the connectivity provision. At the termination
of the Internet connectivity contract, e.g., the customer
moves to another service provider ...
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In order for the Internet to scale using existing technologies, use
of regional registry services ...
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a) the organization has no intention of connecting to
the Internet-either now or in the future-but it still
requires a globally unique IP address. The organization
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... 1918.
If it is determined this is not possible, they can be
issued unique (if not Internet routable) IP addresses.
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... networks described
in RFC1918 until an Internet connection is established. Note that
addresses ...
... addresses issued directly from the IRs,(non-provider based), are the
least likely to be routable across the Internet.
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Because the number of available IP addresses on the Internet is
limited, the utilization rate of address space will be a key factor
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... in network number assignment. Therefore, in the best interest of the
Internet as a whole, specific guidelines have been created to govern
the assignment of addresses ...
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5. Due to technical and implementation constraints on the Internet
routing system and the possibility of routing ...
... (provider-independent, also known as portable) are not
guaranteed routable on the Internet.
6. Information provided to request address space ...